blob: 68b9f5f614ee6ee91506a706ccd60b03a22ee237 [file] [log] [blame]
From 2b144769b8d88652ed455bd426084f2e4f667452 Mon Sep 17 00:00:00 2001
From: Ben Widawsky <ben@bwidawsk.net>
Date: Tue, 28 May 2013 19:22:25 -0700
Subject: drm/i915: Create an ivybridge_irq_preinstall
Just duplicates ironlake_irq_preinstall for now.
v2: Add new PCH_NOP check (Damien)
Add SDEIMR comment (Damien)
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Update now outdated comment.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 7d99163da69e04ccae0b52093f716167ed71d66d)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 35 +++++++++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 85149d27f9e1..f490d54f4726 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2528,6 +2528,37 @@ static void ironlake_irq_preinstall(struct drm_device *dev)
I915_WRITE(GTIER, 0x0);
POSTING_READ(GTIER);
+ /* south display irq */
+ I915_WRITE(SDEIMR, 0xffffffff);
+ /*
+ * SDEIER is also touched by the interrupt handler to work around missed
+ * PCH interrupts. Hence we can't update it after the interrupt handler
+ * is enabled - instead we unconditionally enable all PCH interrupt
+ * sources here, but then only unmask them as needed with SDEIMR.
+ */
+ I915_WRITE(SDEIER, 0xffffffff);
+ POSTING_READ(SDEIER);
+}
+
+static void ivybridge_irq_preinstall(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
+
+ atomic_set(&dev_priv->irq_received, 0);
+
+ I915_WRITE(HWSTAM, 0xeffe);
+
+ /* XXX hotplug from PCH */
+
+ I915_WRITE(DEIMR, 0xffffffff);
+ I915_WRITE(DEIER, 0x0);
+ POSTING_READ(DEIER);
+
+ /* and GT */
+ I915_WRITE(GTIMR, 0xffffffff);
+ I915_WRITE(GTIER, 0x0);
+ POSTING_READ(GTIER);
+
if (HAS_PCH_NOP(dev))
return;
@@ -3531,9 +3562,9 @@ void intel_irq_init(struct drm_device *dev)
dev->driver->disable_vblank = valleyview_disable_vblank;
dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
} else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
- /* Share pre & uninstall handlers with ILK/SNB */
+ /* Share uninstall handlers with ILK/SNB */
dev->driver->irq_handler = ivybridge_irq_handler;
- dev->driver->irq_preinstall = ironlake_irq_preinstall;
+ dev->driver->irq_preinstall = ivybridge_irq_preinstall;
dev->driver->irq_postinstall = ivybridge_irq_postinstall;
dev->driver->irq_uninstall = ironlake_irq_uninstall;
dev->driver->enable_vblank = ivybridge_enable_vblank;
--
1.8.5.rc3